Applied Mechanics and Materials Vols. 409-410

Abstract: The paper has an introduction of photo-thermal of solar energy technology in this project. At the same time, it analysis the necessity of carrying forward technique and the integration of wooden structure construction and as well as social benefit produced by renewable energy source technology.

Abstract: Aimed at a new type of ventilation - stratum ventilation, air distributions at a breathing-zone in a model office were measured under kinds of air changes, the measure parameters in the experimental studies included temperatures, wind speeds and pollutant concentrations, based on which the thermal comfort at a breathing-zone were studied. Experimental results show that, the temperature, pollutant concentration and wind speeds in a breathing-zone under 5 times air changes are better than those under 6 times air changes. The calculating results of PMV and PPD indicate that the thermal comfort at a breathing-zone under 5 times air changes is better. The experimental study is instructive for the development of the ventilation.

Abstract: Because the micro-grid investors, beneficiary, management mode, etc. are fairly different from those of traditional power grid. From the perspective of micro grid users or operators, this paper analyzes the operating and maintenance cost of power pack of multi-energy source hybrid power supply, designs the micro-grid power pack model of multi-energy source hybrid power supply by use of static planning measure, aiming at the minimization of operating cost, and analyzes the power pack configuration under the condition of different minimum operating costs by case study and how to achieve the operating and maintenance profits.

Abstract: The application of autonomous wind-solar power generation system will break the bottleneck of sustainable city and regional development, and it is an important method to solve the world energy crisis. Not only can solve the problem of power supply in remote mountainous areas, but also can be used in the city buildings and park areas. Therefore, the feasibility study of autonomous wind-solar power generation system is particularly necessary. Firstly, this paper has analyzed the background of wind-solar system. Moreover, the significance of evaluation index system for feasibility of autonomous wind-solar power generation system has be discussed in this paper. Secondly, the paper has constituted the comprehensive evaluation index system. In addition, the paper has discussed consistent and dimensionless processing method of evaluation index. Finally, the paper has come up with the method that determines the index weight. The paper will provide a theoretical basis for large-scale use of autonomous wind-solar power generation system.

Abstract: Building exterior wall full life cycle assessment is the whole life cycle of various building materials, components production, planning, design, construction, operation and disposal phases in the material energy flow generated by the economic benefit, social benefit and environmental benefit,which is the sum of the evaluation. Full life cycle assessment is a very broad concept, it is to do the comprehensive analysis of the life cycle process, including the environmental systems, energy systems, natural resources, human health and so on. various aspects are to assess the influence of the potential, and ultimately to find ways to improve. Exterior wall full life cycle of economic evaluation model is established, the core content is a comprehensive economic evaluation of the scheme of building external wall structure, economic benefit evaluation of different exterior design, which provides the strong basis for the adoption of reasonable solution.

Abstract: In this paper, an improved noise prediction model based on FHWA was used in the noise prediction and evaluation of Shang Zhou to Dan Feng expressway to study the function of the model playing in environmental impact assessment.

Abstract: This article surveys mainly the microclimate diversity and transition characteristics of air temperatures and relative humiditys differences between exterior and different interior spaces at a typical Chinese residence in the cold-winter and hot-summer area by summer and winter, which is under the situation without air conditioning. According to the results, building envelope is the main factor of affecting the stability of indoor environment, limited impact on the relative humidity. The closed state of living space and ventilation are also the origin of causing the difference of RH.

Abstract: Two concise calculations of the sound pressure level (SPL) in a small space have been developed by establishing the prediction model. The models can be employed to predict the SPL accurately, which affects speech articulation in small space. So these methods may be able to evaluate the acoustical qualities of the chambers in a building. It is facilitate the further acoustical design in a room with small size.

Abstract: The growth of urban population and subsequent expansion of the cities impose difficulties of gather a reliable water supply systems that attend the fluctuations of demand throughout the day, and their operation with appropriate hydraulic and operational parameters. The search of better routines for water pumping stations with both starting and stopping of pumps or use of variable speed devices has become increasingly common, and the motivation of this search is found in the need for energy saving. But the task is arduous and becomes fertile field for the application of modern techniques and robust optimization. Noteworthy are currently those that seek their inspiration in nature systems, such as Particle Swarm Optimization, which is based on intelligence of groups, such as schools of fish or swarms of bee. By this way, the present work aims to contribute to the topic, developing a hybrid algorithm (simulator-optimizer) for determination of optimized routines for pumping station i.e., routines that seek the best operational routine for an extended period of 24 hours.

Abstract: Taking the student dormitory building in Changan campus of Northwestern Polytechnical University as an example, this thesis investigates the behavior and psychology of the habitants in the use process. It analyzes the current using situation and characteristics of existing dormitory mode, discusses the dormitory space mode suitable for contemporary college students to live, in order to improve the college dormitory environment.